Start object expected – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” start object expected ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: repositories.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “start object expected”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

} else {
 throw new ElasticsearchParseException("unknown field name [" + field + "]");
 } else {
 throw new ElasticsearchParseException("start object expected");
 final Map indexLookup =
 indexSnapshots.keySet().stream().collect(Collectors.toMap(IndexId::getId; Function.identity()));
 return new RepositoryData(genId; snapshots; snapshotStates; snapshotVersions; indexSnapshots;;
 new IndexMetaDataGenerations(indexMetaLookup.entrySet().stream().collect(


Watch product tour

Watch how AutoOps finds & fixes Elasticsearch problems

Analyze Your Cluster
Skip to content